On reload/restart we must wait for services to stop first

This patch adds support for declaring *why* a service is being stopped
or reloaded.  This is later used when all stopped services have been
collected by the `service_monitor()` to issue start or postponed SIGHUP.

As an added benefit we can now also see why a service is not running.
If it has been paused by a user, halted when moving to another runlevel,
waiting for a condition (event), or similar.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

inetd.c

@@ -212,7 +212,7 @@ void inetd_stop(inetd_t *inetd)
 
 	/* Stop any running service, not allowed anymore. */
 	if (svc->pid)
-		service_stop(svc);
+		service_stop(svc, SVC_WAITING_STATE);
 }
 
 static int getent(char *service, char *proto, struct servent **sv, struct protoent **pv)